MH88617
DCRI
RDI
RDO
TIP
IC
RING
IC
LR
RC
ESE
ESI
LCA
IC
IC
VBAT
IC
SHK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 Pin DIL
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VX
GVX
DCRI
IC
IC
IC
VCC
AGND
VEE
ZA
RV
VR
RDI
RDO
LR
TIP
RING
VBAT
LCA
VX
GVX
VR
VCC
AGND
VEE
RV
ESE
ESI
IC
SHK
RC
ZA
Advance Information
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
21 Pin SIL
Figure 2 - Pin Connections
Pin Description
28
Pin
DIL
26
16
15
5
1
3
12
9
21
Pin
SIL
1
2
3
4
5
6
7
8
Name
DCRI
RDI
RDO
LR
TIP
RING
VBAT
LCA
Description
DC Ringing Voltage Input.
A continuous DC voltage is applied to this pin. This voltage
is the positive supply rail for the internal ringing amplifier.
Relay Driver Input.
Relay driver control pin.
Relay Driver Output.
Open collector relay driver output.
Line Reversal.
Setting this pin to a logic 0 will perform a line reversal. This pin must be
connected to logic 1 for normal operation.
Tip Lead.
Connects to the "Tip" lead of the subscriber line.
Ring Lead.
Connects to the "Ring" lead of the subscriber line.
Battery Voltage.
Battery supply for the subscriber line. Typically -48V DC is applied to
this pin.
Loop Current Adjust.
The loop current is programmed by connecting a resistor between
this pin and the VCC or AGND pins. Leaving this pin open circuit defaults the loop current
to 24mA. Setting this pin to 0V will apply power down.
Transmit Signal (Output).
4-wire analog signal from the SLIC.
Transmit Gain Adjust.
The transmit gain can be programmed by connecting a resistor
between this pin and VX. The Network Balance Impedance can also be programmed by
connecting external matching components from this pin to VR.
Receive Signal (Input).
4-wire analog signal to the SLIC.
Positive Supply Voltage.
+5V.
28
27
9
10
VX
GVX
17
22
21
20
11
12
13
14
VR
VCC
AGND
Analog Ground.
Ground path for the subscriber line and all DC power supplies,
normally connected to system ground.
VEE
Negative Supply Voltage.
-5V.
2-158
MITEL [ MITEL NETWORKS CORPORATION ]
